Connection conn = JdbcUtil.getConnection();
String sql = "insert into user(name,password,email,birthday)
values('abc','123','[email protected]','1978-08-08')";
PreparedStatement st = conn.
prepareStatement(sql,Statement.RETURN_GENERATED_KEYS );
st.executeUpdate();
ResultSet rs = st.getGeneratedKeys(); //得到插入行的主键
if(rs.next())
System.out.println(rs.getObject(1));